Biological pesticide capable of preventing and treating tomato bacterial speck and preparation

Abstract

The invention discloses biological pesticide capable of preventing and treating tomato bacterial speck and preparation and belongs to the technical field of biological pesticide. The biological pesticide is prepared by compounding a component A, a component B, a surfactant and a co-solvent; the component A is prepared from Chinese medicinal herbs including branch and leaf of fruticose breynia juvenile, herb of glomerate galingale, root of leucas ciliata benth and iris japonica; the component B is 77 percent Delite copper calcium sulfate wettable powder; an antibacterial test and a field test prove that the biological pesticide has good antibacterial and field prevention and treatment effects.

Description

technical field [0001] The invention relates to the technical field of medicaments, in particular to a biological pesticide for preventing and treating bacterial spot disease of tomato and a preparation method thereof. Background technique [0002] Tomato bacterial spot disease is also called bacterial microspot. It mainly harms leaves, stems, flowers, petioles and fruits, especially leaf margins and immature fruits. Infected leaves produce dark brown to black spots often surrounded by yellow halos; infected petioles and stems produce black spots; infected young green fruits produce small, slightly raised spots, which remain when the fruit is nearly ripe Green for a long time, different from other bacterial spot diseases. The fungus survives the winter on the seeds, diseased residues and soil, and when the infected seeds are sown, the seedlings will be infected. After planting, the diseased seedlings began to spread into the field, and spread or re-infected through rain s...

AI Technical Summary

Problems solved by technology

At present, the prevention and treatment of the disease is mainly based on chemical pesticides, but chemical pesticides are easy to volatilize into the air, flow into water bodies, settle and accumulate in the soil, pollute agricultural, livestock, fish and fruit products, and transfer to human beings through the enrichment of the food chain. in vivo, harmful to the human body

High-efficiency and highly toxic pesticides are highly toxic and remain in the environment for a long time. When humans and animals eat food containing pesticide residues, they will cause cumulative poisoning

This type of hazard often takes a long time to accumulate before showing symptoms, and it enters the human body through the enrichment of the food chain, and it is difficult to detect in time, causing serious harm

When toxic pesticides are applied to crops, vegetables and fruit trees, the pesticides remaining on the surface of the crops, due to their strong fat solubility, can easily penetrate into the waxy layer of the crop epidermis, making it difficult to completely wash off

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